Considering the costs involved in setting up a true on-the-fly video/audio cam system (I have done so in the past numerous times for some adult websites my company helped build), I don't think it would be cost effective.
I think, as a deterrent, it would be best to simply put on a pony show. Make the people think they are on cam which is being transmitted back to a server in your brokers office. A great tool for quick wireless audio and video is the x10 cameras at
http://www.x10.com . Once you get familiar with the tech, you can be up and running with maybe 5 minutes per camera max.